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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV. |
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01-09-2012, 06:36 PM | #21 |
Gone Wild
Join Date: Jul 2011
Location: Houston, TX
Posts: 2,901
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Re: Battery Question
Is your charger an automatic charger?
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01-09-2012, 07:15 PM | #22 |
Not Yet Wild
Join Date: Jan 2012
Location: NC
Posts: 16
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Re: Battery Question
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01-09-2012, 07:22 PM | #23 |
Gone Wild
Join Date: Jul 2011
Location: Houston, TX
Posts: 2,901
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Re: Battery Question
You said the charger was still at 10 when you took it off? 10 amperes? If so, why did you unplug it?
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01-09-2012, 07:32 PM | #24 |
Not Yet Wild
Join Date: Jan 2012
Location: NC
Posts: 16
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Re: Battery Question
Batteries sounded like they were "boiling". I could hear it standing about 5' away. I didn't think it sounded "good". This charging batteries thing is new to me.
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01-09-2012, 07:59 PM | #25 |
Not Yet Wild
Join Date: Jan 2012
Location: NC
Posts: 16
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Re: Battery Question
Just checked each battery.
4V 6.2V 6.09V 6.36V 6.03V 6.26V That's not doing anything to them since unplugging the charger down to 10amps about 24hrs ago |
01-09-2012, 10:10 PM | #26 |
Gone Wild
Join Date: Jul 2011
Location: Houston, TX
Posts: 2,901
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Re: Battery Question
You have a battery with a bad cell. It's gonna sound like your batteries are boiling that is what they do when they are gassing.
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01-09-2012, 10:26 PM | #27 |
Not Yet Wild
Join Date: Jan 2012
Location: NC
Posts: 16
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Re: Battery Question
Is there anything to do to fix that dead cell?
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01-09-2012, 10:56 PM | #28 |
Not Yet Wild
Join Date: Jan 2012
Location: NC
Posts: 16
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Re: Battery Question
Does the Epsom Salt trick work?
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01-10-2012, 01:32 AM | #29 |
Gone Wild
Join Date: Jul 2011
Location: Houston, TX
Posts: 2,901
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Re: Battery Question
Not on dead cells. Only against sulfation.
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01-10-2012, 07:57 AM | #30 | |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: Battery Question
Quote:
Gassing uses water, so the water must be replaced. Here is a a Trojan Battery tech-mote on watering: http://www.trojanbattery.com/Battery...ngDiagram.aspx The ammeter on a charger only tells you how many Amps are flowing. I don't know where the green scale begins or ends on a Lester 8714, but color coded scales are more or less meaningless, it is the numbers that are important. With a good set of 225AH batteries that are less than 50% discharged, the ammeter should jump to about 25A and stay there up to about half an hour. Then it will begin tapering off to about 2-8A and stay in that approximate flow rate range until batteries are fully charged. Fully charged is somewhat ambiguous term that is generally taken to mean when an automatic charger shuts off, which typically equates to the charger sensing an on-charge voltage in the 44-46V range for a 36V charger. Technically, fully charged means when the batteries on-charge voltage and/or specific Gravity of the electrolyte ceases to rise or increase. With a manual charger, you have to set how long you want the batteries to charge on the timer and you want to charge then until the on-charge voltage measures about 46V. It'll take some trial and error, to figure out how many hours are needed when the batteries are down the 60% SoC versus when they are only down to 80% SoC, but both batteries and charger are fairly forgiving, so about all couple extra hours on charge will do is convert more water to hydrogen and oxygen. BTW: Hydrogen and Oxygen gases form an explosive mixture, so no sparks or flames around batteries while charging, and wear a face shield (or at least safety glasses) and skin protection while working under the seat. I suspected you had a bad battery when you said one battery was 20V and the rest were 30V in you earlier post, but now we know for sure. One battery has a shorted cell; One is good; Two are marginal. Two are beyond their useful life. 4V = Shorted cell 6.2V = 70% 6.09V = 50% 6.36V = 98% 6.03V = 50% 6.26V = 80% You need a new set of batteries, but if you can accept less than optimal performance and can find some good used batteries of similar age and type, you might get away for a few months or maybe a year or so, with just replacing the worst three. Of course, you can replace the three bad batteries with new ones, but the battery pack will be limited by the weakest battery and the new ones will soon degrade to the level of the weaker batteries. |
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